Pentax PK bayonet 1.4/50mm alternatives: CHINON COSINA RICOH

berw · Joined: 20 Oct 2012 Posts: 38

OK, here's some older shots with the Agfa Color and the XR Rikenon. Not artistic shots, just playing with lenses.

Agfa

Rikenon

Pancolart · Expire: 2013-11-18

Rich colors, fine bokeh, thanks for sharing!

kopi234 · Joined: 25 Jul 2012 Posts: 103 Location: Indonesia

last sample of afga, very amazing!

iangreenhalgh1 · Expire: 2014-01-07

So how do you know who made these, is it just guesswork?

How do you explain this lens I have, labelled Chinon but with a barrel marked the same as the supposed Cosinas?

Or is it just a coincidence this lens is marked up in exactly the same way as the 'Cosina'?

Whoever made it, it's a crappy lens, worst 50-ish lens I've used apart from the dreaded Domiplan.

TrueLoveOne · Expire: 2013-12-24

Chinon did not produce their lenses themselves, it's a rebrander. So it's not uncommon that they can be found in different designs.

I've had several 55mm Chinon versions, but never a bad one, my guess is there must be something wrong with yours.
Besides that: this thread is about the 50mm versions.

@pancolart:
Which reminds me.... i do have the Revuenon 50mm version you have in the first pics. Somehow it's just been sitting on a camera on my shelf and has never been used. It's a PK mount, i will take some shots with it soon!

Pancolart · Expire: 2013-11-18

Ian your CHINON M42 is typical 1.4/55mm Tomioka, quite older then my posted COSINA PK 1.4/50mm. My guess is that at start Tomioka supplied complete 1.4/55mm lenses. Later both Cosina and CHINON produce bodies themselves, possibly with inserted Tomioka optical block. With PK 1.4/50mm COSINA presumably broke ties with Tomioka history. RED dot DOF scale markings are found on many different lenses even Fuji and Olympus.

Better question is PK CHINON 1.4/50mm since it retained Tomioka's flat rear element!
Though i had them both disassembled i sadly didn't compare at the time. That is still to be done. Maybe member Nukemall has some opinion.

iangreenhalgh1 · Expire: 2014-01-07

Thanks for the explanation, it's clearly a very different lens to these 1.4/50 PKs, which look very nice to my eyes from the samples. I'll keep my eye out for a 1.4/50 to replace it. I need a 'normal' lens in PK for my Ricoh XR-X I've modified to use unperforated film, hence my interest in PK mount normals. It came with a Riconar 2.2/55 which is not bad.

TrueLoveOne · Expire: 2013-12-24

Revuenon 1.4/50, never used it before, it has sticky blades, but on the NEX no problem for these quick testshots. All straight JPG from the NEX3, no PP besides resize.

The lens:

And now some very UN-scientific testshots with some crops.

DOF at f/1.4:

at f/1.4:

Crop of the f/1.4 shot:

at f/2.8:

Crop of the f/2.8 shot:

at f/4:

Crop of the f/4 shot:

Another f/4 shot:

At f/8:

And finally a crop of an f/2.8 shot i took inside:

I should clean it and use it.... it's quite okay from what i've seen so far from these few shots!

iangreenhalgh1 · Expire: 2014-01-07

Nice samples, I'd say it's better than okay, it's as good as many more expensive lenses imho.

With third party lenses, you really have to try the lens out before you know how it's going to perform, experience has taught me that duds are petty common.

You definitely don't have a dud. Smile

Pancolart · Expire: 2013-11-18

TrueLoveOne · Expire: 2013-12-24

Thanks guys! Very Happy

Pancolart · Expire: 2013-11-18

Here's few from RICOH 1.4/50mm & NEX-C3 all wide-open, no sharpening:

Mike Deep · Joined: 25 Oct 2008 Posts: 323 Location: Upstate New York

As requested, here is the Vivitar 50mm f1.4.

I can confirm the following:
- Serial starts with 9.
- 49mm filter thread.
- Convex rear element.
- 8 upward aperture blades.
- Mount has 4 screws.
- Focusing grease is dry.

No samples yet.

Pancolart · Expire: 2013-11-18

Thanks Mike. Nice Cosina clone there. Looking forward for samples!

The above photos from my Rikenon were badly processed. Please check Oversized in BW: http://forum.mflenses.com/ricoh-rikenon-1-4-50mm-pk-on-nex-c3-bw-wide-open-t61531.html